Trussed structure



Dec. 27, 1927.

H. G. TREGILLUS TRUSSED STRUCTURE Filed June 23. 1920 2 Shuts-Sheet l 5 7 0 H1. '61 i4. .mm- FL Afi QMW "w Dec. 27, 1927.

1,654,151 H. G. TREIGILLUS wausszzn STRUCTURE Filed June 23. 1920 2 Shuts-Shoat 2 150 0254915 MAM" @5 l Patented a7, 19:227. h r i UNITED STATES. PATENT OFFlCEl.

HAKOMJ G. .IHltGIIitJU'tt, ft! nanntn'erron, ILLINOIS.

TRUSSED sTIEtUCT'UH-El Application filed June 533, rose. tterial No. $91,035.

My invention reiters to trussed structures tied inrerted truss :tornurtions. In these of the class disclosed in in lf'atont No. drawings 1,330,:"51 of February th, 1929. the object Fig. l is a side (devotional View of one of the invention being to provide nioditied terror of structure, i" truss formation which. "will hotter adapt the F2 a sectional view on. line 2-2,

trussed structures to varying; conditions on I!" countered in actual. practice, While at the his. 3 a side elevational ViQW of a inedisame time increasing; the etliciency and pertied term of structure and mitting the structures to he built With great Fins. 4t, 5 and 6 show other modifications. to Q1 y, Referring; to F 1 the trussed structure In the form shown in the patent referred shown comprises the arch member 10, tento, the anchoring or tension ineinhers extend sion members 11. and an inverted truss forfrom the ends of the arch member to inter-- motion to which the arch member is anmediate points thereot, thatthe ends 0t chored by the tension members. The invert- In M the arch term the anclwrapge points .Eor the ed truss torination or structure shown coinanchoring members. Under certain coniir prises the chord .i'neinher 1:2, the inverter tions it man be d .rahle to change the letruss tension members 13 and Lil; and the cation of the anchoring; point or points. For strut member in the term oi: a kinogpost 15 example, Where the span is so long; that the connect ng hetu'eeu the juncture ot the truss- T W stock material for the auiclwring; ineinhers tensio nmmhem d th h 1 b 124 "would not be long enough, it would. he desir- As shown in Fig. the arch. member may able to shift the anchorage points to nerhe conuiosed o't two aii'igle hare o, and the mit the use oi shorter anchoring); nieiuhers. chord member 12 may he coinnosed of two Under other conditions, it n'iight also be deangle bars 7) While. the strut member may he so sirahle to shift the anchoring points away coinnosedv ot two angle pieces 0 ec r d m;

from the ends oi? the arch or truss. In the their upper ends to plate (Z and at their loW- structure of my patent above referred to, We or ends to plates 0, the plate (Z heing secured have an inverted Bellman truss structure asto the arch meinl'ier bars a and the plates c sociated with an arch member and with this being; riveted to the hm-d memb r b r 5, so arrangement the ancl'iorage points are at the he chord and area llflQll'llitW-S are connected arch ends. By cha iaing the term. ot the 1 together their ends by Web plates f and 9* sorted truss structure the ancho'fagre poin to which the truss tension n'ieinlticrs 13 and or p i s itl-IG W Willis of 9F l lare also secured. the inner ends oi these (tilt/i011 the M011 h; llenfiiml men? members being); secured to the plate (Z. The

hers can be ehitted fromv the arch ends to truss structure thus connected directly to some intermediate pointor noints on the th 1 member t th d d m truss structure and such shitting of the anm -11 Th l t 3 i an anchorage chorage points Will permit the 11% 0 Si101"@11? tor the tei'ision nieinhers 11 which radiate tension ini-inihers for connecting); the noun; th -H d m, i h -1 h menu in or points of anchorage with the ar h her at intermediate points thereof. The

lhe tructure oil": which the ehittedanchoo principle f tj fi f thi tl'ussef} Shemu an 130mm liffllm l J U 1 Call the ture is the same as that disclosed in my pat truss structure or formation. and the com" m; f d t fl t i b mi l'iination of this inver e H 1 nether with the truss formation preventing 45 with. the arch member and the tension rneui B l i f th h b d in 11 hers I call the trusted i tfi tion oi. irregular load thereto. and come in oneration, then, the inverted truss tor m-1 mi fl ni f th h mation is anchored to the arch ends, and in member t, thel pointy terioediate points on the arch are anchored P rii r the anchorage points are at the to a predetermined anchorage point, or pro d f th h hi h am h ld pmpefly determined anchorage "points on. the chord Spaced b th h d member 19 hi h b member of the inverted truss formation by comes the tension chord of the trussedstrucnuinher or trusted structures showing modi can he shittedto any desired lncatm on the means ot tension membersture when under load. By means of the 011 the -l l dmwlngg: y 111" truss formation or structure extending" he- Wt venti i is incorporated and illustrated in a t l-seen the arch ends the anchoraf e points the member 18 being in the use of such members being 20 secured to truss structure. In Fig. 1, the shift has been made to the center of the chord member 12, and owing to the rigid truss formaion the point of anchorage represented by the plates 6 is positive. By thus shifting the anchorage much shorter tension members 11 can be used, and there are many advanta "es shorter tension members. 7 In Fig. 8 amodified truss formation is shown. Instead of onlythe two truss tension members of the structure of Fig. 1, three such members 16, 17 and 18 are used, interposed between the inner ends of the members 16 and 17, the fastened to the plates 19 and the arch member 10. lVith this arrange nentof truss ten ion members two strut members 21 and 22 are provided and secured at their upper ends to the plates 19" and 20 and at their lower ends to the anchorage plates 6. The arch member 10 is thus connected directly to the truss formation at four points instead of at three points as shown in the structure, of Fig. 1. The tension members 11 radiate from the anchorage point e to the arch member at intermediate points thereof, one of the tension members extending vertically upwardly to connect with the arch member at the center thereof as clearly shown. 'The principle of operation of the structure of Fig. 3 is exactly the same as that of Fig. 1 and of the structure disclosed in my patent referred to.

Fig. 4 shows another modified arrange ment of truss formation by means of which two anchorage points are provided intermediate the, arch ends, from which anchorage points the arch retaining tension members radiate. The strut members 21 and 22 we tend vertically downwardly from the plates 19 and 20 and are fastened to the anchorage plates 23 and 24 which are secured to the chord member 12. The tension members .25

and 26 radiate from the plates 23 and 24 respectively to desired points on the arch member 10. If the strut members 21 and 22 of the structure of Fig. l were swung inwardly to bring their lower ends together to a common anchorage point, we would have the structure of Fig. 3. By modifying the truss formation a single intermediate anchorage point may be provided as in the structure of Fig. 3, or two anchorage points as in the structure of Fig. 4;, or any desired number ofintermediate anchorage points could be provided and situated either in the line of the chord 12 or above or below such line.

By properly designing the truss formation these anchorage points can be made practically as rigid and positive as they would be if they were at the ends of the arch as in the arrangement shown in my patent referred to.

Fig. 5 shows an arrangement involving three mtermed ate anchorage points 27, 28

and 29 which are on the truss structure comprising the chord 30, the truss tension members 31, 32, 33 and 311, the strut members 35, 3G and 37 and the. diagonals 38. This Fig. 5 represents the conversion of the structure shown in Horton Patent No. 595,629 of December 14th, 1897, into a trussed structure of my invention.

Fig. 6 represents a trussed structure invol ing an anchorage point 39 above the line of the chord 40, the ancl'mragc point being at the crossing of the diagonals 4-1 and 42 extending between the struts and H, tension members to radiating from the anchorage point to the arch member 16.

In the structure shown on the drawings of my patent, the arch retaining members form necessary parts of the inverted Bellman truss structure, while in the arrangement of this application the inverted truss is a structure complete in itself, arch retaining members radiating to the arch member from selected points of anchorage on the truss. In the structure shown on the drawings of the patent, the inverted Bellman truss formation comprises only tension members, while in the arrangement disclosed in this application the truss formations comprise both tension and compression members.

In order that the term inverted as applied to the truss formation shall be clearly understood, it is pointed out that any truss for supporting loads, that is, to resist downward forces, is not inverted, and has the main tension member at the bottom. The truss formation of my invention is for resisting upward forces and has its main tension member at the te It is, therefore, an inverted truss.

Having described my invention, I claim as follows 1. The combination of an arch member and an inverted truss: structure directly .1t tached one to the other at not less than two points, and tension members connecting said truss structure with said arch member at various points thereof, said truss structure being composed of tension and cmnprcssiou members.

2. A trussed structure comprising an arch member and an inverted trus -1 structure whose ends are directly attached thereto, said trussed structure being composed of conr pression and tension members.

3. A trussed structure comprising an arch member, an inverted truss structure directly attached to the arch lllOll'llJGl ends and tension members radiating from a point on said truss structure intermediate the arch ends and connecting with the arch member at various points thereof.

4. In a structure of the class described, the combination of an arch member, positive anchorage means directly attached to the ends of said arch member and comprising ten- Ila 1 sion and compression members, and tension members connecting one point of said anchorage means with said arch member at various points throughout its length.

5. A trussed structure comprising an arch member, a polygon. of tension members hav- Fill ing all its corners directly attached. to said arch, strut means connecting said arch with the side of the polygon opposite the arch, said polygon and strut means forming a truss structure, and tension means connecting said truss structure with said arch member at various points thereof.

6. In a trussed structure of the cl described, the combination of an arch mem her, a truss structure directly attached to the arch member ends and forming positive anchorage between the arch ends, and arch retaining members extending from said truss structure to said arch member at various points of said arch member.

7. In a structure of the class described, the combination of an arch member, a chord member connecting the ends of: said arch member, tension sub-chord members directly attached to the ends and to various points of said arch member, strut means joining said arch member at various points to said chord n'iember, said chord member, tension sub-chord members and strut means torus ing a truss structure, and arch retaining ten sion members radiating from a point of said truss structure to said arch member at various points throughout its length.

8. In a trussed structure of the class described, the combination of an arch member, a chord member connecting the ends of said arch member, truss rods extending from the ends of said chord member to said arch member and sub-tending less than one half o'l said arch member, a center truss rod extending between the inner ends of the atorementim'ied truss rods, strut inen'ibers extending from the iunctures of said truss rods to the chord member at the center thereof, and arch retaining tension members radiating to the arch member from the juncture ot said strut men'ibcrs and chord member.

9. In a structure of the class described, the combination of an arch member, a polygon of tension members having its lower member extending between the R'I.'Clif1119111 her ends and said polygon being directly attached at its corners to the arch member, strut means extending from the polygon corners t said lower tension member, and arch retaining tension members radiating to said arch member from the juncture of said strut means and lower tension member.

.10. A, truss structure comprising an arch, a main chord for the arch, secondary chords for three separate portions of the arch, struts connecting the center of the main chord with the junctures oi: the secondary chords, and tension members connecting the center of the main chord respectively with intermediate points of the said arch por tions.

11. A truss a bottom chord for the same, a tension member connecting the centers of the arch and the bottom chord, a pair of: struts connecting the center of the bottom chord with the arch, the disposed. with respect to the tension mein her; a tension member connecting the upper ends oi the struts, and a pair of tension inon'iljiers forming chords of the arch and leading; respectively from the ends of the bottom chord.

1.2. A, truss stl'uctin'e comprising an arch, a lmttom chord tor the same, an odd numhcr' ot secondary chords disposed symmetrically with respect and respectively 'liorining chords for con secuiire portions elf the complete arch, symmetrically disposed compression members connecting the ends of the medial secondary chord with the bottom chord, and tension members connecting the lower ends of the coi'npression meinliiers respectively with arch poi-lions opposite intermediate points of noni'i'iedial secondary chords.

.1 in an arched truss oi. a i ml ilmlli separate means :tor stiitcninis o tions oil the arch, a main chord tor the arch, struts conuectii'ur the center oi? the main chord with the juuctures oi. the said separate arch portions. and tension members connecting; the center of the main chord with the arch at points intern'iediate ot the said portions,

In witness whereof, I. hereunto subscribe my name this 18th day oi June, A. l). i920.

dare to perinanonn (i. run nimus.

structure comprising an arch,

said struts being symmetrically to the axis of the arch lllll 

